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US 8,858,702 B2Granted
Inorganic phosphate compositions and methods
AssigneeLatitude 18, Inc.
InventorsArun S. Wagh, William George, Vadym Drozd, Kausik Mukhopadhyay, Sameerkumar Vasantlal Patel
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Abstract
Disclosed and described are multi-component inorganic phosphate formulations of acidic phosphate components and basic oxide/hydroxide components. Also disclosed are high solids, atomizable compositions of same, suitable for spray coating.
Claims21
A phosphate ceramic spray composition comprising an atomized combination of:
- a first component comprising a high-solids content aqueous suspension of an acid-phosphate of chemical formula Am(H2PO4)m.nH2O, where A is hydrogen ion, ammonium cation, metal cation, or mixtures thereof;
- where m=1-3, and n=0-6;
- the first component suspension adjusted to a pH of about 2 to about 5;
- wherein the high solids content of first component is at least 63 wt % of the aqueous suspension;
- a second component comprising shear-thinned, high solids content aqueous suspension of an alkaline oxide or alkaline hydroxide represented by B2mOm, B(OH)2m, or mixtures thereof, where B is an element of valency 2m (m=1, 1.5, or 2) the second component suspension adjusted to a pH of between 9-14;
- wherein the high solids content of second component is at least 54 wt % of the aqueous suspension;
- and
- a rheology modifier/suspending agent present in an amount providing the shear thinned second component, the rheology modifier/suspending agent further suspending the high solids content of either the first component or the second component in their respective aqueous suspensions;
- and
- optionally, aggregate material present in an amount in at least one of the first and the second component capable of imparting an observable color and/or texture.
7 more elements
A method of atomizing a sprayable phosphate ceramic composition, the method comprising
- providing (i) a first component comprising a high-solids content aqueous suspension of an acid-phosphate of chemical formula Am(H2PO4)m.nH2O, where A is hydrogen ion, ammonium cation, metal cation, or mixtures thereof;
- where m=1-3, and n=0-6;
- the first component suspension adjusted to a pH of about 2 to about 5;
- wherein the high solids content of first component is at least 63 wt % of the aqueous suspension;
- (ii) shear-thinning a second component comprising high solids content aqueous suspension of an alkaline oxide or alkaline hydroxide represented by B2mOm, B(OH)2m, or mixtures thereof, where B is an element of valency 2m (m=1, 1.5, or 2) the second component suspension adjusted to a pH of between 9-14;
- wherein the second component is separated from the first component prior to atomization;
- wherein the high solids content of second component is at least 54 wt % of the aqueous suspension;
- and
- (iii) a rheology modifier/suspending agent present in an amount providing the shear thinned second component prior to exiting the dispensing device, the rheology modifier/suspending agent further suspending the high solids content of either the first component or the second component in their respective aqueous suspensions, resulting in a decrease in the viscosity thereof for atomization;
- and
- (iv) optionally, aggregate material present in an amount in at least one of the first and the second component capable of imparting an observable color and/or texture;
- and
- atomizing the first component and second component.
10 more elements
Dependencies are inferred from the claim text.